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Preparation method of fluoride-free super-hydrophobic surface

A technology of super-hydrophobic surface and super-hydrophobic coating is applied in the field of preparation of fluorine-free super-hydrophobic surface, which can solve problems such as application limitations, and achieve the effects of dimensional stability, improved anti-fouling and anti-scaling, and increased mechanical strength.

Inactive Publication Date: 2017-06-20
NANTONG TEXTILE & SILK IND TECH RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the research on superhydrophobic materials is mainly divided into two aspects: on the one hand, the research on bionic superhydrophobic structure, through the research on the surface microstructure of superhydrophobic functional organs of organisms (commonly plants or animals), so as to imitate them through experimental methods. Similar structures are used to prepare superhydrophobic materials; on the other hand, fluorine-containing reagents are used to treat the surface of materials, but the application of this method is limited due to the toxicity of fluorine-containing reagents

Method used

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  • Preparation method of fluoride-free super-hydrophobic surface
  • Preparation method of fluoride-free super-hydrophobic surface
  • Preparation method of fluoride-free super-hydrophobic surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of superhydrophobic coating solution

[0029] 2 g of polymethyl methacrylate (PMMA) and 2 g of polydimethylsiloxane (PDMS) were dissolved in 50 mL of tetrahydrofuran solvent, and the dissolution was promoted by ultrasound to prepare a superhydrophobic coating solution.

[0030] Preparation of superhydrophobic surfaces

[0031] Get 2Ml of super-hydrophobic coating solution and spray it on the substrate glass plate through a spray gun, the spraying pressure is set to 0.2MPa, and the distance between the spray gun and the substrate is set to 15cm to make a super-hydrophobic surface.

[0032] Such as figure 1 As shown, the peak of the Si element in the EDS energy spectrum of the fluorine-free superhydrophobic surface prepared in this embodiment is relatively obvious, indicating that the surface of the glass plate substrate has been covered by the coating. Such as figure 2 As shown, the surface of the coating presents a concave-convex micro-nano structure. S...

Embodiment 2

[0035] Preparation of superhydrophobic coating solution

[0036] 2 g of polymethyl methacrylate (PMMA) was dissolved in 50 mL of tetrahydrofuran solvent, and the dissolution was promoted by ultrasound to prepare a superhydrophobic polymer coating liquid.

[0037] Preparation of superhydrophobic surfaces

[0038] Take 2mL of the superhydrophobic polymer coating solution and spray it on the substrate glass plate through the spray gun, the spray pressure is set to 0.2MPa, and the distance between the spray gun and the substrate is set to 15cm to obtain a superhydrophobic surface.

[0039] The hydrophobicity of the fluorine-free super-hydrophobic surface after 50g of sand with a particle size of 300 microns falls from a height of 50cm to the surface of the coating and after 5000 drops of 22 microliters of water drop from a height of 50cm to the coating The hydrophobic properties of the surface are as follows Figure 5 As shown, PDMS further plays a role in enhancing the bonding ...

Embodiment 3

[0041] Preparation of superhydrophobic coating solution

[0042] 2 g of polydimethylsiloxane (PDMS) was dissolved in 50 mL of tetrahydrofuran solvent, and ultrasonic waves were used to promote the dissolution to prepare a superhydrophobic polymer coating liquid.

[0043] Preparation of superhydrophobic surfaces

[0044] Take 2mL of the super-hydrophobic polymer coating solution and spray it on the base glass plate through a spray gun, the spraying pressure is set to 0.2MPa, and the distance between the spray gun and the glass plate is set to 15cm to obtain a super-hydrophobic surface.

[0045] The fluorine-free superhydrophobic surface prepared by this embodiment has the hydrophobic properties after being immersed in acid-base solution for 24h as Image 6 As shown, the fluorine-free superhydrophobic surface still maintains good hydrophobic properties after being immersed in acid and alkali for 24 hours, and the water contact angle remains above 150°. Such as Figure 7 As sh...

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Abstract

The invention discloses a preparation method of a fluoride-free super-hydrophobic surface. The preparation method comprises the following steps: polymethyl methacrylate and / or polydimethylsiloxane are / is dissolved into a solvent, ultrasonic is adopted for facilitating dissolution, and super-hydrophobic coating liquid is prepared; and the super-hydrophobic coating liquid is sprayed onto a substrate, and the super-hydrophobic surface is prepared. Polymethyl methacrylate is sprayed on the surface of the substrate for building a coarse structure, and with the adoption of polydimethylsiloxane, the surface energy is further reduced and the binding force between a coating and the substrate is improved, so that the super-hydrophobic surface having the good mechanical property and the good chemical property are prepared on various substrates. On the condition that no fluorine is used, environmental protection is facilitated and better hydrophobicity can be obtained.

Description

technical field [0001] The invention belongs to a method for preparing a superhydrophobic surface, and more specifically relates to a method for preparing a fluorine-free superhydrophobic surface. Background technique [0002] Superhydrophobic technology is a new type of technology with special surface properties. It has important characteristics such as waterproof, anti-fog, anti-snow, anti-pollution, anti-oxidation, anti-corrosion, self-cleaning, and prevention of current conduction. It is widely used in scientific research, production, and life. There are extremely broad application prospects in the field. [0003] At present, the research on superhydrophobic materials is mainly divided into two aspects: on the one hand, the research on bionic superhydrophobic structure, through the research on the surface microstructure of superhydrophobic functional organs of organisms (commonly plants or animals), so as to imitate them through experimental methods. Similar structures ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D1/02C09D133/12C09D183/04C09D5/08
Inventor 黄剑莹刘慧赖跃坤张生孙青梅李飞洋李煜伟
Owner NANTONG TEXTILE & SILK IND TECH RES INST
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